Why my data set has no Security menu

Hi parunwit 

I can see Security function in your Dataset FIM. This workspace is My workspace.

If you couldn't see Security in App Workspace, please check whether you are the administrator of the group.

You may refer to this blog to set your Row level Security in Power BI Desktop and then publish your report to Power BI Service.

For reference: Row-level security (RLS) with Power BI

Best Regards,
Rico Zhou

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